diff options
Diffstat (limited to 'modules/hangul/hangul-x.c')
| -rw-r--r-- | modules/hangul/hangul-x.c | 899 |
1 files changed, 0 insertions, 899 deletions
diff --git a/modules/hangul/hangul-x.c b/modules/hangul/hangul-x.c deleted file mode 100644 index 72bbc655..00000000 --- a/modules/hangul/hangul-x.c +++ /dev/null @@ -1,899 +0,0 @@ -/* Pango - * hangul.c: - * - * Copyright (C) 1999, 2002 Changwoo Ryu - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -#include <glib.h> -#include <stdlib.h> -#include <string.h> - -#include "pangox.h" -#include "pango-engine.h" - -#define SCRIPT_ENGINE_NAME "HangulScriptEngineX" - -static PangoEngineRange hangul_ranges[] = { - - /* Hangul Jamo U+1100 -- U+11FF */ - { 0x1100, 0x11ff, "*" }, - /* Hangul Compatibility Jamo U+3130 -- U+318F */ -/* { 0x3130, 0x318f, "*" }, */ - /* Hangul (pre-composed) Syllables U+AC00 -- U+D7A3 */ - { 0xac00, 0xd7a3, "*" } -}; - - -static PangoEngineInfo script_engines[] = { - { - SCRIPT_ENGINE_NAME, - PANGO_ENGINE_TYPE_SHAPE, - PANGO_RENDER_TYPE_X, - hangul_ranges, G_N_ELEMENTS(hangul_ranges) - } -}; - -static int n_script_engines = G_N_ELEMENTS (script_engines); - -/* - * X window system script engine portion - */ - -static void -set_glyph (PangoGlyphString *glyphs, - int i, - PangoFont *font, - PangoXSubfont subfont, - guint16 gindex) -{ - PangoRectangle logical_rect; - - glyphs->glyphs[i].glyph = PANGO_X_MAKE_GLYPH (subfont, gindex); - - glyphs->glyphs[i].geometry.x_offset = 0; - glyphs->glyphs[i].geometry.y_offset = 0; - - pango_font_get_glyph_extents (font, glyphs->glyphs[i].glyph, NULL, &logical_rect); - glyphs->glyphs[i].geometry.width = logical_rect.width; -} - -static void -set_unknown_glyph (PangoGlyphString *glyphs, - int *n_glyphs, - PangoFont *font, - gunichar wc, - int cluster_offset) -{ - PangoRectangle logical_rect; - gint i = *n_glyphs; - - (*n_glyphs)++; - pango_glyph_string_set_size (glyphs, *n_glyphs); - - glyphs->glyphs[i].glyph = pango_x_get_unknown_glyph (font); - - glyphs->glyphs[i].geometry.x_offset = 0; - glyphs->glyphs[i].geometry.y_offset = 0; - - pango_font_get_glyph_extents (font, glyphs->glyphs[i].glyph, NULL, &logical_rect); - glyphs->glyphs[i].geometry.width = logical_rect.width; - - glyphs->log_clusters[i] = cluster_offset; -} - - -#include "hangul-defs.h" - -typedef void (* RenderSyllableFunc) (PangoFont *font, PangoXSubfont subfont, - gunichar *text, int length, - PangoGlyphString *glyphs, - int *n_glyphs, int cluster_offset); - - - -#include "tables-johabfont.i" -#include "tables-ksc5601.i" -#include "tables-jamos.i" - -#define JOHAB_COMMON \ - int i; \ - guint16 gindex; \ - \ - /* \ - * Check if there are one CHOSEONG, one JUNGSEONG, and no more \ - * than one JONGSEONG. \ - */ \ - int n_cho = 0, n_jung = 0, n_jong = 0; \ - i = 0; \ - while (i < length && IS_L (text[i])) \ - { \ - n_cho++; \ - i++; \ - } \ - while (i < length && IS_V (text[i])) \ - { \ - n_jung++; \ - i++; \ - } \ - while (i < length && IS_T (text[i])) \ - { \ - n_jong++; \ - i++; \ - } \ - \ - if (n_cho <= 1 && n_jung <= 1) \ - { \ - int composed = 0; \ - gunichar l, v, t = 0; \ - \ - l = (n_cho > 0) ? text[0] : LFILL; \ - v = (n_jung > 0) ? text[n_cho] : VFILL; \ - t = (n_jong > 0) ? text[n_cho + n_jung] : 0; \ - \ - if ((__choseong_johabfont_base[l - LBASE] != 0 || l == LFILL) && \ - (__jungseong_johabfont_base[v - VBASE] != 0 || v == VFILL) && \ - (!t || (__jongseong_johabfont_base[t - TBASE] != 0))) \ - composed = n_cho + n_jung + ((n_jong > 0) ? 1 : 0); \ - else if ((__choseong_johabfont_base[l - LBASE] != 0 || l == LFILL) && \ - (__jungseong_johabfont_base[v - VBASE] != 0 || v == VFILL)) \ - composed = n_cho + n_jung; \ - \ - /* COMPOSABLE */ \ - if (composed) \ - { \ - if (l != LFILL) \ - { \ - gindex = __choseong_johabfont_base[l - LBASE]; \ - if (!t) \ - { \ - if (v == VFILL) \ - gindex += 1; \ - else \ - gindex += __choseong_map_1[v - VBASE]; \ - } \ - else \ - { \ - if (v == VFILL) \ - gindex += 6; \ - else \ - gindex += __choseong_map_2[v - VBASE]; \ - } \ - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); \ - set_glyph (glyphs, *n_glyphs, font, subfont, gindex); \ - glyphs->log_clusters[*n_glyphs] = cluster_offset; \ - (*n_glyphs)++; \ - } \ - \ - if (v != VFILL) \ - { \ - gindex = __jungseong_johabfont_base[v - VBASE]; \ - switch (__johabfont_jungseong_kind[v - VBASE]) \ - { \ - case 3: \ - if (t) \ - gindex += __johabfont_jongseong_kind[t - TBASE]; \ - break; \ - case 4: \ - gindex += ((l == 0x1100 || l == 0x110f) ? 0 : 1) + \ - (t ? 2 : 0); \ - break; \ - } \ - \ - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); \ - set_glyph (glyphs, *n_glyphs, font, subfont, gindex); \ - glyphs->log_clusters[*n_glyphs] = cluster_offset; \ - (*n_glyphs)++; \ - } \ - \ - if (t) \ - { \ - gindex = __jongseong_johabfont_base[t - TBASE] + \ - __jongseong_map[v - VBASE]; \ - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); \ - set_glyph (glyphs, *n_glyphs, font, subfont, gindex); \ - glyphs->log_clusters[*n_glyphs] = cluster_offset; \ - (*n_glyphs)++; \ - } \ - \ - if (v == VFILL && !t) /* dummy for no zero width */ \ - { \ - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); \ - set_glyph (glyphs, *n_glyphs, font, subfont, JOHAB_FILLER); \ - glyphs->log_clusters[*n_glyphs] = cluster_offset; \ - (*n_glyphs)++; \ - } \ - \ - text += composed; \ - length -= composed; \ - } \ - } - -static void -render_syllable_with_johabs (PangoFont *font, PangoXSubfont subfont, - gunichar *text, int length, - PangoGlyphString *glyphs, - int *n_glyphs, int cluster_offset) -{ - int n_prev_glyphs = *n_glyphs; - JOHAB_COMMON - - /* Render as uncomposed forms as a fallback. */ - for (i = 0; i < length; i++) - { - int j; - - if (text[i] == LFILL || text[i] == VFILL) - continue; - /* - * Uses KSC5601 symbol glyphs which johabS-1 has; they're - * not in the normal johab-1. The glyphs are better than composable - * components. - */ - for (j = 0; j < 3 && (__jamo_to_ksc5601[text[i] - LBASE][j] != 0); j++) - { - gindex = __jamo_to_ksc5601[text[i] - LBASE][j]; - - if ((gindex >= 0x2421) && (gindex <= 0x247f)) - gindex += (0x032b - 0x2421); - else if ((gindex >= 0x2321) && (gindex <= 0x2420)) - gindex += (0x02cd - 0x2321); - else - break; - - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, gindex); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - } - if (j == 0) - set_unknown_glyph (glyphs, n_glyphs, font, text[i], cluster_offset); - } - /* No glyph rendered yet; it means the empty syllable (ex. LFILL+VFILL) */ - if (n_prev_glyphs == *n_glyphs) - { - gindex = JOHAB_FILLER; - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, gindex); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - } -} - -static void -render_syllable_with_johab (PangoFont *font, PangoXSubfont subfont, - gunichar *text, int length, - PangoGlyphString *glyphs, - int *n_glyphs, int cluster_offset) -{ - int n_prev_glyphs = *n_glyphs; - JOHAB_COMMON - - /* Render as uncomposed forms as a fallback. */ - for (i = 0; i < length; i++) - { - int j; - - if (text[i] == LFILL || text[i] == VFILL) - continue; - for (j = 0; (j < 3) && (__jamo_to_johabfont[text[i]-LBASE][j] != 0); j++) - { - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, - __jamo_to_johabfont[text[i] - LBASE][j]); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - if (IS_L (text[i]) || IS_T (text[i])) - { - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, JOHAB_FILLER); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - } - } - if (j == 0) - set_unknown_glyph (glyphs, n_glyphs, font, text[i], cluster_offset); - } - /* No glyph rendered yet; it means the empty syllable (ex. LFILL+VFILL) */ - if (n_prev_glyphs == *n_glyphs) - { - gindex = JOHAB_FILLER; - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, gindex); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - } -} - -static void -render_syllable_with_ksx1001johab (PangoFont *font, PangoXSubfont subfont, - gunichar *text, int length, - PangoGlyphString *glyphs, - int *n_glyphs, int cluster_offset) -{ - int n_prev_glyphs = *n_glyphs; - guint16 gindex; - int i, composed; - - if (length >= 3 && IS_L_S(text[0]) && IS_V_S(text[1]) && IS_T_S(text[2])) - composed = 3; - else if (length >= 2 && IS_L_S(text[0]) && IS_V_S(text[1])) - composed = 2; - else - composed = 0; - - if (composed) - { - int lindex, vindex, tindex; - - lindex = text[0] - LBASE; - vindex = text[1] - VBASE; - if (composed == 3) - tindex = text[2] - TBASE; - else - tindex = 0; - - /* convert to JOHAB */ - - gindex = 0x8000 + (larray[lindex] << 10) + (varray[vindex] << 5) + tarray[tindex]; - - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, gindex); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - text += composed; - length -= composed; - } - - /* Render as uncomposed forms as a fallback. */ - for (i = 0; i < length; i++) - { - int j; - - if (text[i] == LFILL || text[i] == VFILL) - continue; - - gindex = text[i]; - for (j = 0; (j < 3) && (__jamo_to_ksc5601[gindex - LBASE][j] != 0); j++) - { - int index = __jamo_to_ksc5601[gindex - LBASE][j]; - if (index >= 0x2400 && index < 0x2500) - index = 0xda80 + index % 256; - else /* 0x2300 - 0x2400 */ - index = 0xda10 + index % 256 + (index > 0x236e ? 0x12 : 0); - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, index); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - } - if (j == 0) - set_unknown_glyph (glyphs, n_glyphs, font, gindex, cluster_offset); - } - /* No glyph rendered yet; it means the empty syllable (ex. LFILL+VFILL) */ - if (n_prev_glyphs == *n_glyphs) - { - gindex = 0xd931; - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, gindex); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - } -} - -static void -render_syllable_with_iso10646 (PangoFont *font, PangoXSubfont subfont, - gunichar *text, int length, - PangoGlyphString *glyphs, - int *n_glyphs, int cluster_offset) -{ - int n_prev_glyphs = *n_glyphs; - guint16 gindex; - int i, composed; - - if (length >= 3 && IS_L_S(text[0]) && IS_V_S(text[1]) && IS_T_S(text[2])) - composed = 3; - else if (length >= 2 && IS_L_S(text[0]) && IS_V_S(text[1])) - composed = 2; - else - composed = 0; - - if (composed) - { - if (composed == 3) - gindex = S_FROM_LVT(text[0], text[1], text[2]); - else - gindex = S_FROM_LV(text[0], text[1]); - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, gindex); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - text += composed; - length -= composed; - } - - /* Render as uncomposed forms as a fallback. */ - for (i = 0; i < length; i++) - { - if (text[i] == LFILL || text[i] == VFILL) - continue; - - gindex = text[i]; - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, gindex); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - } - /* No glyph rendered yet; it means the empty syllable (ex. LFILL+VFILL) */ - if (n_prev_glyphs == *n_glyphs) - { - gindex = 0x3164; - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, gindex); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - } -} - -static int -find_ksc5601 (gunichar ucs) -{ - int l = 0; - int u = KSC5601_HANGUL - 1; - int index; - - guint16 try; - - /* Do binary search. */ - while (l <= u) - { - int m = (l + u) / 2; - try = __ksc5601_hangul_to_ucs[m]; - if (try > ucs) - u = m - 1; - else if (try < ucs) - l = m + 1; - else - { - /* equation to find the index in ksc5601 font. */ - index = (((m / 94) + 0x30) << 8) | ((m % 94) + 0x21); - return index; - } - } - return 0; -} - -static gboolean -try_decompose_jongseong(gunichar jong, gunichar *jong1, gunichar *jong2) -{ - static gunichar table[][2] = { - {0, 0}, - /* U+11A8- */ - {0, 0}, {0, 0}, {0x11A8, 0x11BA}, {0, 0}, - {0x11AB, 0x11BD}, {0x11AB, 0x11C2}, {0, 0}, {0, 0}, - /* U+11B0- */ - {0x11AF, 0x11A8}, {0x11AF, 0x11B7}, {0x11AF, 0x11B8}, {0x11AF, 0x11BA}, - {0x11AF, 0x11C0}, {0x11AF, 0x11C1}, {0x11AF, 0x11C2}, {0, 0}, - {0, 0}, {0x11B8, 0x11BA}, {0, 0}, {0, 0}, - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - /* U+11C0- */ - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - /* U+11D0- */ - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - /* U+11E0- */ - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - /* U+11F0- */ - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {0, 0}, {0, 0}, {0, 0}, {0, 0} - }; - - if (IS_T(jong) && table[jong - TBASE][0]) - { - *jong1 = table[jong - TBASE][0]; - *jong2 = table[jong - TBASE][1]; - return TRUE; - } - else - return FALSE; -} - -static void -render_syllable_with_ksc5601 (PangoFont *font, PangoXSubfont subfont, - gunichar *text, int length, - PangoGlyphString *glyphs, - int *n_glyphs, int cluster_offset) -{ - int n_prev_glyphs = *n_glyphs; - int gindex = 0, composed = 0; - gunichar jong1, jong2 = 0; - int i; - - if (length >= 3 && IS_L_S(text[0]) && IS_V_S(text[1]) && IS_T_S(text[2])) - { - gindex = find_ksc5601(S_FROM_LVT(text[0], text[1], text[2])); - if (gindex) - composed = 3; - else - { - if (try_decompose_jongseong(text[2], &jong1, &jong2)) - { - gindex = find_ksc5601(S_FROM_LVT(text[0], text[1], jong1)); - composed = 3; - } - } - } - if (!composed && length >= 2 && IS_L_S(text[0]) && IS_V_S(text[1])) - { - gindex = find_ksc5601(S_FROM_LV(text[0], text[1])); - if (gindex) - composed = 2; - } - - if (composed) - { - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, gindex); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - text += composed; - length -= composed; - } - - if (jong2) - { - int i; - - for (i = 0; (i < 3) && (__jamo_to_ksc5601[jong2 - LBASE][i] != 0); i++) - { - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, - __jamo_to_ksc5601[jong2 - LBASE][i]); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - } - if (i == 0) - set_unknown_glyph (glyphs, n_glyphs, font, gindex, cluster_offset); - } - - for (i = 0; i < length; i++) - { - int j; - - gindex = text[i]; - for (j = 0; (j < 3) && (__jamo_to_ksc5601[gindex - LBASE][j] != 0); j++) - { - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, - __jamo_to_ksc5601[gindex - LBASE][j]); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - } - if (j == 0) - set_unknown_glyph (glyphs, n_glyphs, font, gindex, cluster_offset); - } - /* No glyph rendered yet; it means the empty syllable (ex. LFILL+VFILL) */ - if (n_prev_glyphs == *n_glyphs) - { - gindex = 0x2121; - pango_glyph_string_set_size (glyphs, *n_glyphs + 1); - set_glyph (glyphs, *n_glyphs, font, subfont, gindex); - glyphs->log_clusters[*n_glyphs] = cluster_offset; - (*n_glyphs)++; - } -} - -static gboolean -subfont_has_korean (PangoFont *font, - PangoXSubfont subfont) -{ - /* Check for syllables and for uncomposed jamos. We do this - * very unscientifically - if we have the first glyph, we - * assume we have them all. It might be better to try - * for the last one, to account for lazy font designers. - */ - - if (!pango_x_has_glyph (font, PANGO_X_MAKE_GLYPH (subfont, 0xac00))) - return FALSE; - if (!pango_x_has_glyph (font, PANGO_X_MAKE_GLYPH (subfont, 0x1100))) - return FALSE; - - return TRUE; -} - -static gboolean -find_subfont (PangoFont *font, char **charsets, int n_charsets, - PangoXSubfont *subfont, RenderSyllableFunc *render_func) -{ - int i; - int n_subfonts; - PangoXSubfont *subfonts; - int *subfont_charsets; - - n_subfonts = pango_x_list_subfonts (font, charsets, n_charsets, &subfonts, &subfont_charsets); - - *subfont = 0; - - for (i=0; i<n_subfonts; i++) - { - if (strcmp (charsets[subfont_charsets[i]], "johabs-1") == 0 || - strcmp (charsets[subfont_charsets[i]], "johabsh-1") == 0) - { - *subfont = subfonts[i]; - *render_func = render_syllable_with_johabs; - break; - } - else if (strcmp (charsets[subfont_charsets[i]], "johab-1") == 0) - { - *subfont = subfonts[i]; - *render_func = render_syllable_with_johab; - break; - } - else if (strcmp (charsets[subfont_charsets[i]], "iso10646-1") == 0) - { - if (subfont_has_korean (font, subfonts[i])) - { - *subfont = subfonts[i]; - *render_func = render_syllable_with_iso10646; - break; - } - } - else if (strcmp (charsets[subfont_charsets[i]], "ksc5601.1992-3") == 0) - { - *subfont = subfonts[i]; - *render_func = render_syllable_with_ksx1001johab; - break; - } - else if (strcmp (charsets[subfont_charsets[i]], "ksc5601.1987-0") == 0) - { - *subfont = subfonts[i]; - *render_func = render_syllable_with_ksc5601; - break; - } - } - - g_free (subfonts); - g_free (subfont_charsets); - - return (*subfont != 0); -} - -static char *default_charset[] = { - "johabs-1" -}; - -static char *secondary_charset[] = { - "johab-1" -}; - -static char *fallback_charsets[] = { - "iso10646-1", - "ksc5601.1992-3", - "ksc5601.1987-0" -}; - -static void -hangul_engine_shape (PangoFont *font, - const char *text, - int length, - PangoAnalysis *analysis, - PangoGlyphString *glyphs) -{ - PangoXSubfont subfont; - RenderSyllableFunc render_func = NULL; - - int n_chars, n_glyphs; - int i; - const char *p, *start; - - gunichar jamos_static[8]; - guint max_jamos = G_N_ELEMENTS (jamos_static); - gunichar *jamos = jamos_static; - int n_jamos = 0; - - g_return_if_fail (font != NULL); - g_return_if_fail (text != NULL); - g_return_if_fail (length >= 0); - g_return_if_fail (analysis != NULL); - - /* check available fonts. Always use a johab font if available; - * otherwise use iso-10646 or KSC font depending on the ordering - * of the fontlist. - */ - if (!find_subfont (font, default_charset, G_N_ELEMENTS (default_charset), &subfont, &render_func)) - if (!find_subfont (font, secondary_charset, G_N_ELEMENTS (secondary_charset), &subfont, &render_func)) - if (!find_subfont (font, fallback_charsets, G_N_ELEMENTS (fallback_charsets), &subfont, &render_func)) - { - n_chars = g_utf8_strlen (text, length); - pango_x_fallback_shape (font, glyphs, text, n_chars); - return; - } - - n_chars = g_utf8_strlen (text, length); - n_glyphs = 0; - start = p = text; - n_jamos = 0; - - for (i = 0; i < n_chars; i++) - { - gunichar wc; - - wc = g_utf8_get_char (p); - - /* Check syllable boundaries. */ - if (n_jamos) - { - gunichar prev = jamos[n_jamos - 1]; - if ((!IS_L (prev) && IS_S (wc)) || - (IS_T (prev) && IS_L (wc)) || - (IS_V (prev) && IS_L (wc)) || - (IS_T (prev) && IS_V (wc))) - { - /* Draw a syllable. */ - - (*render_func) (font, subfont, jamos, n_jamos, - glyphs, &n_glyphs, start - text); - n_jamos = 0; - start = p; - } - } - - if (n_jamos == max_jamos) - { - max_jamos += 3; /* at most 3 for each syllable code (L+V+T) */ - if (jamos == jamos_static) - { - jamos = g_new (gunichar, max_jamos); - memcpy (jamos, jamos_static, n_jamos*sizeof(gunichar)); - } - else - jamos = g_renew (gunichar, jamos, max_jamos); - } - - if (IS_S (wc)) - { - jamos[n_jamos++] = L_FROM_S (wc); - jamos[n_jamos++] = V_FROM_S (wc); - if (S_HAS_T (wc)) - jamos[n_jamos++] = T_FROM_S (wc); - } - else if (IS_M (wc) && !n_jamos) - ; /* ignore M's which do not follow syllables */ - else - jamos[n_jamos++] = wc; - p = g_utf8_next_char (p); - } - - /* Draw the remaining Jamos. */ - if (n_jamos) - (*render_func) (font, subfont, jamos, n_jamos, - glyphs, &n_glyphs, start - text); - - if (jamos != jamos_static) - g_free (jamos); -} - -static PangoCoverage * -hangul_engine_get_coverage (PangoFont *font, - PangoLanguage *lang) -{ - PangoCoverage *result = pango_coverage_new (); - PangoXSubfont subfont; - RenderSyllableFunc render_func = NULL; - int i; - - /* An approximate implementation, please check and fix as necessary! - * OWT 2 Feb 2000 - */ - if (find_subfont (font, default_charset, G_N_ELEMENTS (default_charset), &subfont, &render_func) || - find_subfont (font, secondary_charset, G_N_ELEMENTS (secondary_charset), &subfont, &render_func) || - find_subfont (font, fallback_charsets, G_N_ELEMENTS (fallback_charsets), &subfont, &render_func)) - { - if (render_func == render_syllable_with_johabs || - render_func == render_syllable_with_johab) - { - for (i = 0x1100; i <= 0x11ff; i++) - pango_coverage_set (result, i, PANGO_COVERAGE_EXACT); - - for (i = 0xac00; i <= 0xd7a3; i++) - pango_coverage_set (result, i, PANGO_COVERAGE_EXACT); - - } - else if (render_func == render_syllable_with_iso10646) - { - for (i = 0x1100; i <= 0x11ff; i++) - pango_coverage_set (result, i, PANGO_COVERAGE_FALLBACK); - - for (i = 0xac00; i <= 0xd7a3; i++) - pango_coverage_set (result, i, PANGO_COVERAGE_EXACT); - } - else if (render_func == render_syllable_with_ksc5601) - { - for (i = 0x1100; i <= 0x11ff; i++) - pango_coverage_set (result, i, PANGO_COVERAGE_FALLBACK); - - for (i = 0xac00; i <= 0xd7a3; i++) - pango_coverage_set (result, i, PANGO_COVERAGE_FALLBACK); - - for (i=0; i<KSC5601_HANGUL; i++) - pango_coverage_set (result, __ksc5601_hangul_to_ucs[i], PANGO_COVERAGE_EXACT); - } - else if (render_func == render_syllable_with_ksx1001johab) - { - for (i = 0x1100; i <= 0x11ff; i++) - pango_coverage_set (result, i, PANGO_COVERAGE_EXACT); - - for (i = 0xac00; i <= 0xd7a3; i++) - pango_coverage_set (result, i, PANGO_COVERAGE_EXACT); - } - else - g_assert_not_reached(); - } - - return result; -} - -static PangoEngine * -hangul_engine_x_new () -{ - PangoEngineShape *result; - - result = g_new (PangoEngineShape, 1); - - result->engine.id = SCRIPT_ENGINE_NAME; - result->engine.type = PANGO_ENGINE_TYPE_SHAPE; - result->engine.length = sizeof (result); - result->script_shape = hangul_engine_shape; - result->get_coverage = hangul_engine_get_coverage; - - return (PangoEngine *)result; -} - - - -/* The following three functions provide the public module API for Pango - */ -void -PANGO_MODULE_ENTRY(list) (PangoEngineInfo **engines, - int *n_engines) -{ - *engines = script_engines; - *n_engines = n_script_engines; -} - -PangoEngine * -PANGO_MODULE_ENTRY(load) (const char *id) -{ - if (!strcmp (id, SCRIPT_ENGINE_NAME)) - return hangul_engine_x_new (); - else - return NULL; -} - -void -PANGO_MODULE_ENTRY(unload) (PangoEngine *engine) -{ -} |